TOODY(ID:7492/)

Interactive modelling system 

becuase it sounds like 2D

Interactive system for solving problems of motion in two dimensions
References:
  • [Sandia Corp, Albuquerque, N. Mex.] "TOODY: A Computer Program for Calculating Problems of Motion in Two Dimensions" M69-10318 view details Abstract: TOODY is a FORTRAN code for computing wave propagation in two dimensions in rectangular or cylindrical coordinates. The code is based on the conventional finite difference analogs to the Lagrangian equations of motion and is similar in many respects to other such codes. A maximum of 2,260 meshes and 10 different materials can be accomodated. The finite difference technique is an approximate method of solving the non-linear partial differential equations describing two-dimensional motion. The degree of approximation depends on the mesh sizes, mesh shape, and artificial viscosity coefficients which are used. Four types of boundary conditions considered are: (1) a free surface, (2) a surface with an applied stress acting on it, (3) a symmetry plane, and (4) rigid non-sliding boundary. In the program each of these can be handled by assuming that there are boundary meshes of a "pseudo material" surrounding the object.

          in Computer Program Abstracts Cumulative Issue July 15, 1969 -- July 15, 1971 view details